On Signup: You can design your signup process to include some questions/fields that help you segment. Instead of just asking for an email, you can ask the city, the company they work with, the pain point they are trying to solve, etc.
A popular way to collect this data is to design a quiz as your lead magnet. Take people through a set of questions that help them know something about themselves and you in turn get the data to sort your audience.
After signup, through surveys: If you haven't designed a process to collect subscribers’ data on signup, you can do that once people are part of your list. Send them a survey from time to time asking one key question that will help you target them with relevant messages.
Using email marketing tools to monitor actions: Sometimes, you don't need to ask questions from subscribers but can form segments by noticing their activity on your website or in emails.
You have to create a hypothesis. Here's a formula to do that: Changing ____ into ____ will _____ e.g. Changing email to text-form will improve the deliverability.
You should know what component of email marketing influences which metric e.g. Subject line influencers open rate.
Check if your email marketing tool allows you to test the component you choose. Most ESPs allow testing Subject lines, but some may not allow testing email content.

SendX
SendX is a cloud-based, email marketing tool suitable for managing bulk email lists without compromising on the deliverability of emails or struggling with complicated tools.
Pricing: Pricing is based on the number of contacts & you can send unlimited emails. 14-day free trial, paid plan starts at $7.49/mo for 1000 contacts.
Suitable for: Small & medium businesses, industries that are unfairly banned by other tools (gaming, crypto, casinos)
Features useful for list management:
- Landing page & signup forms to grow the email list
- Segmentations and tagging to organize contacts into categories
- A/B testing capability
- Automate list cleaning with customized rules
- Import CSV or migrate from other tools, easily and quickly.

ActiveCampaign
ActiveCampaign is a tool that focuses on helping companies create great customer experiences through email marketing, marketing automation, and CRM.
Pricing: 14-day free trial with $7.50/month as starting price for 500 contacts.
Suitable for: Small and medium businesses that need powerful automations
Features useful for list management:
- Tags and lists to segment contacts
- Visual automation builder to create rules for adding tags to contacts
- Import list of contacts, individual contacts or download a list in format you want
- Delete, merge and edit lists
- Capability to add custom fields and tags to any contact or a full list

HubSpot
HubSpot is more than list management or email marketing tool. It's a full CRM pretty useful for enterprise clients. And that's why its list management capabilities are robust.
Pricing: The email marketing tool is free for up to 2,000 emails sent per month. Paid plan starts at $45/month.
Suitable for: If you have a strong marketing strategy to cover the costs of your investment in an expensive tool.
Features useful for list management:
- Building list based on contact properties (company, location, activity, etc.)
- Assigning lifecycle stage to each contact
- Concept of smart & static list. Smart list updates itself automatically
- Exclude parameters to remove certain contacts from the campaign
- Export and import functionality

Mailchimp
Mailchimp is an email marketing software suitable for beginners as well as experts. It's easy to get started with because of its intuitive interface & visual builders.
Pricing: Forever free for up to 2000 emails. Paid plan starts at $10/month
Suitable for: Bloggers, agencies, eCommerce companies, businesses needing CRM, landing page builder, Email platform all in one place
Features useful for list management:
- Easy to read dashboard for list growth, list engagement with your emails
- Possibility to archive your contacts instead of deleting them
- Automatically removes addresses from your audience that hard bounce
- Opt-in form, strict implementation of CAN-SPAM rules
- Option to A/B test subject line, from-name, content, send time

ConvertKit
ConvertKit is a simple tool focused on helping creators connect to their audience via emails. Optimized for deliverability with text-based, HTML emails.
Pricing: It's free for up to 1000 subscribers. Paid plan starts from $49/month.
Suitable for: ConvertKit is a tool meant for creators (bloggers, musicians, artists, and vloggers).
Features useful for list management:
- Each Subscriber is only counted once in your account
- Tags and segmentation capabilities to organize contacts into categories
- Easy export and import of contacts
Here's a detailed guide diving deeper into the tools mentioned above plus 3 additional tools to help you understand if which one would be right for your business.
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